A sterile implantable artificial substitute for a diseased or injured femoral head that has an outer surface made of ceramic (e.g., alumina, zirconia). It is designed to be attached to the trunnion of a prosthetic femoral stem/shaft or a head/stem adaptor, and to articulate with an acetabulum prosthesis as part of a total hip arthroplasty (THA) or with a bipolar component as part of a partial hip replacement. The device ranges in form from partially to fully spherical (ball-shaped) and is available in various sizes.